Q: What are the prime factors of the number 422,625?

 A: 3, 5, 7, 23

Why are those the prime factors of the number 422,625?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 422,625

422,625
Factor Arrows
3140,875
Factor Arrows
528,175
Factor Arrows
55,635
Factor Arrows
51,127
Factor Arrows
7161
Factor Arrows
723

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

3, 5, 7, 23

We can check our work by multiplying all of the prime factors together: 3 x 5 x 5 x 5 x 7 x 7 x 23 = 422,625

This can also be written as 31 x 53 x 72 x 231 = 422,625

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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